Campaign 2014 (PhD Chapter 1)

1. Maps
- 1.1. General map
- 1.2. Parameters maps
2. Figures

This series of files compile all analyses done during Chapter 1 for the local campaign of 2014:

All analyses have been done with PRIMER-e 6 and R 3.6.0.

Click on the table of contents in the left margin to assess a specific analysis.
Click on a figure to zoom it

To assess analyses and regressions, click here.
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Caracteristics of each campaign

		2014	2016	2017
Sampling date		August-September	June to August	July
Criteria for perturbation		Potentially impacted if close to the city or industries, References outside the bay	Human-impacted if in a region with a highly populated area, industries and maritime activities, Reference if none of these criteria	Human-impacted if in a region with a highly populated area, industries and maritime activities, Reference if none of these criteria
Regions considered		BSI	BSI, CPC, BDA, MR	BSI, MR
Number of sampled stations		40 (20 HI, 20 R)	78 (26 BSI, 19 CPC, 18 BDA, 15 MR)	126 (111 BSI, 15 MR)
Parameters sampled	Organic matter	yes	yes	yes
	Photosynthetic pigments	no	yes	yes
	Sediment grain-size	yes	yes	yes
	Heavy-metals	yes	yes (for a limited number of stations)	no (interpolated based on 2014 and 2016 values)
Benthic communities	Compartment targeted	Macro-infauna	Macro-infauna	Macro-infauna
	Sieved used	500 µm	1 mm	500 µm and 1 mm
	Conservation technique	Formaldehyle	Formaldehyle	Formaldehyle
Others		N.A.	N.A.	N.A.

We used data from subtidal ecosystems (see metadata files for more information). Only stations that have been sampled both for abiotic parameters and benthic species were included.

Selected variables for the analyses:

Percentage of organic matter: om
Percentage of gravel: gravel
Percentage of sand: sand
Percentage of silt: silt
Percentage of clay: clay
Concentration of arsenic: arsenic
Concentration of cadmium: cadmium
Concentration of chromium: chromium
Concentration of copper: copper
Concentration of iron: iron
Concentration of manganese: manganese
Concentration of mercury: mercury
Concentration of lead: lead
Concentration of zinc: zinc
Species richness: S
Abundance of total individuals: N
Shannon index: H
Piélou evenness: J

Abundances of Bipalponephtys neotena (Bneo) and Spisula solidissima (Ssol) were also considered (see IndVal and SIMPER results).

Statistics for each variable considered:

	Mean	SD	SE	Median	Min	Max	95% CI
om	1.368	1.465	0.232	0.868	0.187	8.260	0.454
gravel	0.017	0.076	0.012	0.000	0.000	0.481	0.024
sand	0.148	0.358	0.057	0.000	0.000	1.000	0.111
silt	0.004	0.006	0.001	0.001	0.000	0.022	0.002
clay	0.830	0.361	0.057	0.992	0.000	1.000	0.112
arsenic	2.720	1.259	0.199	2.250	1.100	6.000	0.390
cadmium	0.116	0.045	0.007	0.110	0.030	0.220	0.014
chromium	65.520	29.623	4.684	63.200	10.900	143.300	9.180
copper	11.045	8.675	1.372	7.300	2.200	32.400	2.688
iron	64222.926	31677.444	5008.644	60284.230	14089.920	188857.220	9816.761
manganese	1412.044	1050.987	166.176	1106.625	251.670	5962.190	325.698
mercury	0.014	0.043	0.007	0.000	0.000	0.250	0.013
lead	4.308	2.945	0.466	3.110	1.020	12.180	0.913
zinc	53.163	23.870	3.774	45.150	15.900	101.500	7.397
S	20.475	7.906	1.250	18.500	6.000	35.000	2.450
N	640.975	703.306	111.202	176.500	14.000	2103.000	217.953
H	1.840	0.410	0.065	1.917	0.911	2.737	0.127
J	0.636	0.155	0.025	0.622	0.315	0.938	0.048

1. Maps

1.1. General map

1.2. Parameters maps

For maps of heavy metal concentrations, stations have been grouped based on Environment Canada (2007) classification of sediment toxicity (grey = low toxicity, red = high toxicity).

OM

Gravel

Sand

Silt

Clay

Arsenic

Cadmium

Chromium

Copper

Iron

Manganese

Mercury

Lead

Zinc

Species

Species richness

Total abundance

Shannon index

Piélou’s evenness

2. Figures

2.1. Barplots

Organic matter

Grain-size

Heavy metals

Species abundances

Diversity indices

2.2. Phylum frequencies

Conditions

Phylum abundances by condition
Phylum	HI	R
Annelida	20360	1135
Phoronida	1138	2
Arthropoda	883	749
Mollusca	361	743
Cnidaria	42	40
Bryozoa	8	22
Platyhelminthes	5	0
Echinodermata	4	139
Hemichordata	2	0
Chaetognatha	0	1
Nematoda	0	0
Nemertea	0	5
Sipuncula	0	0

Sites

Phylum abundances by site
Phylum	P1	P2	P3	P4	R1	R2	R3	R4
Annelida	6065	7459	6155	681	43	106	926	60
Phoronida	408	317	412	1	0	0	1	1
Arthropoda	289	317	219	58	40	281	399	29
Mollusca	60	113	80	108	30	381	110	222
Cnidaria	13	11	9	9	11	15	7	7
Bryozoa	4	1	0	3	0	14	2	6
Echinodermata	4	0	0	0	20	65	49	5
Platyhelminthes	1	0	4	0	0	0	0	0
Chaetognatha	0	0	0	0	0	1	0	0
Hemichordata	0	0	2	0	0	0	0	0
Nematoda	0	0	0	0	0	0	0	0
Nemertea	0	0	0	0	0	5	0	0
Sipuncula	0	0	0	0	0	0	0	0